JP2001331559A - Earthquake-proofing selection system for pipe network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally constitute a system which easily extract from a pipe network a pipeline whose damage caused in case of an earthquake is required to be reduced. SOLUTION: This system is equipped with a general computer which estimates damage to pipelines according to pipeline information constituting a pipe network and previously set earthquake information, selects pipelines to be made earthquake-proof among the estimated damaged pipelines according to a rule set previously on the basis of damage rates, deterioration, importance, etc., and displays them on a display 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic selection system for a pipe network, and more particularly, to a technique for selecting pipes to be earthquake-resistant in advance when an earthquake damages a water supply pipe network.

[0002]

2. Description of the Related Art Although a pipeline to be made earthquake-resistant is not selected in advance, there is a technology disclosed in Japanese Patent Application Laid-Open No. 9-259186 as a technology for dealing with earthquake damage to a water supply pipeline when an earthquake occurs. In this conventional technology, a seismometer, a pressure gauge for measuring pressure in a pipeline, and a flowmeter for measuring flow rate in a pipeline are provided, and after an earthquake occurs, ground acceleration data from the seismometer and pressure from the pressure gauge are provided. At least one of the data and the flow data from the flow meter is taken into the server, the pipeline damage rate is estimated for each regional mesh, the number of damaged pipelines is calculated from the estimation result, and the pipeline with the highest break priority is selected. By allocating the number of broken pipelines corresponding to the number of damaged pipelines, a process of determining the location of leakage and the amount of leakage is performed, and restoration work can be performed based on this.

[0003]

SUMMARY OF THE INVENTION The prior art is one that can immediately determine the degree of damage after an earthquake and facilitates planning for restoration work. And it is important to judge the damage after the occurrence of the earthquake in this way, but it is also important to promote the earthquake resistance of the water pipe. Therefore, even when considering earthquake resistance, many pipelines are buried under the road, and when performing construction, take measures such as blocking road traffic and performing construction at night. It is necessary to replace the buried pipeline in the construction for earthquake resistance, so that not only a large amount of cost is required for the construction but also a long time is required for the construction. Therefore, it is not realistic to try to make many pipelines earthquake resistant in a short period of time. Considering this fact, it is considered ideal to minimize the damage in the event of an earthquake by making the pipelines as seismic resistant as possible.
However, it is difficult to extract a pipeline that minimizes damage when an earthquake occurs, and a technique that can easily extract a pipeline that reduces damage is desired.

An object of the present invention is to rationally construct a system capable of easily extracting from a pipe network a pipe for reducing damage when an earthquake occurs.

[0005]

A first feature (claim 1) of the present invention is an estimation process for estimating a damaged pipeline caused by an earthquake to a pipe network, and a process for estimating a plurality of damaged pipelines thus estimated. There is provided a processing device for performing a selection process of selecting a pipeline to be made earthquake-resistant based on a preset rule, and its operation and effect are as follows.

A second feature of the present invention (claim 2) is that, in claim 1, wherein the estimation processing divides the pipe network into a plurality of areas, and the seismic acceleration and the laying of pipes in each area. It consists of a process of calculating the damage rate based on the conditions and a process of estimating the damage pipeline based on the damage ratio and the random number. The operations and effects are as follows. .

A third feature of the present invention (claim 3) is that, in claim 1 or 2, the rule of the selection processing is set so as to select the seismic resistance from those having a higher priority. Among the damaged pipelines estimated by the estimation processing, the pipeline with the higher damage rate is given a higher priority, and its operation and effect are as follows.

[0008] A fourth feature of the present invention (claim 4) is that, in claim 1 or 2, the rule of the selection processing is set so as to select seismic resistance from those having a higher priority. In the point that the priority of the main pipeline that supplies the most water to the preset water supply point among the damaged pipelines estimated by the estimation process is set higher,
And the effect is as follows.

According to a fifth feature of the present invention (claim 5), according to claim 1 or 2, the rule of the selection processing is set so as to select seismic resistance from those having a higher priority. Among the damaged pipelines estimated by the estimation processing, the pipeline with the high degree of aging is given a higher priority, and its operation and effect are as follows.

A sixth feature (claim 6) of the present invention is that, in claim 1 or 2, the rule of the selection processing is set so as to select the seismic retrofit from the one with the highest priority. Among the damaged pipelines estimated by the estimation process, the priority of hydraulically important pipelines with large populations subject to water pressure reduction and low pressure at the time of damage is set high, and the operation and effects are as follows. is there.

A seventh feature (claim 7) of the present invention is that, in claim 1 or 2, the rule of the selection processing is set so as to select the seismic retrofit from the one with the lowest priority, and the laying is performed. It is set so that the cost of the replacement pipeline can be calculated, and its operation and effect are as follows.

An eighth feature of the present invention (claim 8) according to any one of claims 1 to 7, is that a plurality of pipeline installation information stored in a storage means is combined and used as the pipe network. The operation and effects are as follows.

[Action]

According to the first feature, the pipeline damaged by the earthquake is estimated by the estimation process, and the pipeline to be made earthquake-resistant is selected from a plurality of the damaged pipelines estimated in this way by the selection process. Will be selected based on the In other words, in addition to simply estimating the damaged pipelines in the pipeline when an earthquake occurs, when selecting pipelines to be made earthquake-resistant among the damaged pipelines based on rules, concrete Prioritize seismic protection based on established rules, such as selecting conduits to be seismic-resistant and selecting conduits to secure water supply to important facilities to be seismic-resistant This enables automatic selection of a pipeline to be performed.

According to the second feature, since the damage probability is obtained based on the acceleration of the seismic motion for each area obtained by processing such as partitioning the pipe network with a mesh, the probability for the entire pipe network is obtained. In addition to increasing the accuracy of the damage probability as compared to, the damage pipeline in each area is estimated based on this damage probability and random numbers, so that the damage pipeline can be reasonably estimated based on the theory of probability. Become.

According to the third feature, since the priority is given to the pipeline having a high damage rate at the time of occurrence of an earthquake, the pipeline which is easily damaged can be extracted as the pipeline to be earthquake-resistant.

According to the fourth feature, the priority order of the main pipeline that supplies the most water to facilities that require water supply when an earthquake occurs, such as hospitals and public facilities, is set high. The main pipeline for water supply can be extracted as a pipeline to be earthquake-resistant.

According to the fifth feature, if a pipeline with a high degree of aging is left as it is, water leakage and red rust easily occur, and such a pipeline can be extracted as a pipeline to be earthquake-resistant.

According to the sixth feature, since the priority of the hydraulically important pipeline, which is greatly affected by a decrease in water pressure at the time of damage, is set high, this hydraulically important pipeline is used as a pipeline to be earthquake-resistant. It can be extracted.

According to the seventh feature, it is possible to calculate the replacement cost of the pipeline for which the replacement is selected.

According to the eighth feature, since a plurality of pipeline laying information stored in the storage means is combined and used, the trouble of inputting information of the entire pipe network, which tends to increase the information amount, can be omitted. It is also possible to extract a pipeline using existing information that records the location, diameter and length of the installed pipeline.

[Effects of the Invention] Therefore, a system that can easily extract from the pipe network pipes that reduce damage when an earthquake occurs is rationally constructed. In addition to estimating the damaged pipeline of the pipe network without difficulty, appropriate treatment is possible, and pipelines that are susceptible to damage, pipelines that send water to important facilities, pipelines with high aging, and water pressure during disasters Pipelines that are greatly affected by the decline and pipes with low installation costs can be extracted without error as targets for seismic resistance processing, and existing pipeline information can be extracted without the need to newly enter pipe network information. These processes can be performed on the basis of.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a pipe network having a display 1 composed of a CRT or a liquid crystal display device as an output device and a general-purpose computer 3 as a processing device having a built-in hard disk 2 as a storage means is provided. A damage evaluation system is configured. As shown in FIG. 1, the general-purpose computer 3 is provided with a keyboard 4 for data input and a mouse 5 as pointing means. The general-purpose computer 3 is connected to a printer 6 as an output device.

As shown in FIG. 2, this system damages an earthquake in an existing pipe network PN to which water from a water source S is supplied, and damage estimated from an earthquake in a pipe network assuming earthquake resistance. And a program for performing a process of outputting to the display 1 and the printer 6 is set. As shown in FIG. 3, an outline of the process is as follows. In the first estimation process (#A), an earthquake simulation is performed on the existing pipe network PN, and the damaged pipeline estimated by the simulation is already displayed on the display 1. In addition to performing the process of displaying in the pipe network, the population of water interruption or the water interruption rate is estimated in the damage estimation process (#B) based on the damaged pipeline, and the process of displaying the estimation result on the display 1 is performed. In addition, a process for assuming earthquake resistance is performed according to a priority set in advance in the anti-seismic assumption process (#C) from the estimated damaged pipeline, and is further assumed in the anti-seismic assumption process (#C). A process of displaying the assumed result in the pipe network of the display 1 is performed. Next, in the earthquake resistance cost calculation processing (#C ′), the earthquake resistance assumption processing (#
In C), the construction cost required for laying a pipeline that assumes earthquake resistance is calculated, and a second estimation process (#D)
As described above, an earthquake simulation is performed on the pipe network in a state where earthquake resistance is assumed, and the damaged pipe estimated by the simulation is displayed in the pipe network of the display 1, and the damage estimation processing is performed based on the damaged pipe. (#
In E), the population of water interruption or the water interruption rate is estimated, and the estimation result is displayed on the display 1. Next, these #B
The result of the #E estimation process is compared for damage in a comparison process (#F), and the comparison result is output to the display 1 and the printer 6 in an output process (#G).

In this process, a first estimation process (#
A), damage estimation processing (#B), earthquake resistance assumption processing (#C)
FIG. 4 shows only the flow of information used when each processing is performed. That is, an earthquake simulation is executed based on the pipeline information constituting the pipeline PN, correction information described later, and predetermined earthquake information to determine the damage rate (Rm) of each pipeline constituting the pipeline PN. The damage probability (Pf) of each pipeline is estimated based on the damage rate (Rm) of each pipeline and the pipeline length information, and the damage probability (Pf) of each pipeline estimated in this way, a random number, The damage pipeline is estimated on the basis of the above. The above processing is an outline of the first estimation processing (#A), and the damage estimation processing (##) is performed based on the information on the damaged pipeline estimated in this way and the hydraulic analysis information.
B) In other words, the population of water interruption and the water interruption rate are obtained, and the anti-seismic assumption processing (#C) is performed based on the information on the damaged pipeline estimated in this way and the information on the weight value (K). These processes will be described below.

As shown in the flowchart of FIG. 5, the first estimating process (#A) sets the pipeline information and the correction information which constitute the pipeline PN, and performs the pipeline based on the earthquake information. The damage rate (Rm) is estimated, and this pipe damage rate (Rm)
The pipeline damage probability (Pf) is estimated from
f) and the random number are used to estimate the damaged pipeline, and store the identification information of the estimated damaged pipeline and the estimated pipeline in a memory or the like (# 10).
1 to 105 steps).

Specifically, in step # 101, the pipe network PN
Are divided into meshes at predetermined intervals as shown in FIG.
A process for setting the pipeline information in each of the regions Z partitioned in a mesh shape and a process for setting the correction information for the pipeline in each of the regions Z are performed. Here, the structure of the pipeline information file Fa for storing the pipeline information will be described. As shown in FIG. 2, the area where the pipe network PN exists is divided into a plurality of areas Ar and corresponds to each area Ar. The pipeline information file Fa is stored in the hard disk 2. The pipeline information file Fa (an example of pipeline installation information) stored in the hard disk 2 includes a [header] and an [information area] as shown in FIG.
Creation date, update date, data amount, offset position information indicating the position of area Ar, etc. are stored, and [information area] stores pipeline information, valve / plug information, and geographic information. , Pipe line information, Pipe end position, Bend position, Pipe type, Pipe diameter, Pipe length, Installation date, Burial depth, Flow rate (Water volume), Deterioration, Average pressure change, Population subject to pressure reduction, Flow rate ratio And other information, such as valve and plug information, including the location and type of valves and plugs, and geographical information, including information on topography, road locations, and building locations, and earthquake information. It contains information such as seismic intensity, seismic maximum acceleration, and liquefaction risk. Then, in this system, as shown in FIG. 18, in a state where the pipelines are connected by a process such as coordinate conversion of the location of the pipeline information of each pipeline information file Fa, as shown in FIG.
A process of displaying a pipe network PN in the window W1 of the display 1 is performed (the processing mode is not described in detail). If necessary, the window W2 is separately opened to display an enlarged pipeline. Information on the pipeline selected from the pipeline PN, that is, information on the pipe diameter, pipe length, installation date, etc., is read from the pipeline information file Fa, and a process of displaying the information at a position near the pipeline can be performed. I have.

As shown in FIGS. 8 to 11, the correction information includes a "correction coefficient for pipe type" Cp, a "correction coefficient for pipe diameter" Cd, and a "correction coefficient for terrain / ground" C
g, and a "correction coefficient for liquefaction" Cl.
These correction factors are given to each pipeline when simulating an earthquake. Also, earthquake information refers to pipe network PN
Of the hypocenters that have an active fault or the like that affects the area where the earthquake exists, the hypocenter is assumed in advance and includes data of an assumed scale (held by a local government or the like).

In step # 102, a process for estimating the pipeline damage rate (Rm) for each mesh-shaped area Z based on the earthquake information is performed. The above-mentioned data is used for this earthquake information, and the equation published by the Japan Water Works Association is used to estimate the pipeline damage rate (Rm),
The formula is as follows.

Rm (α) = Cp × Cd × Cg × Cl × R (α), Rm (α): Damage rate when the maximum acceleration of earthquake motion is α, Cp: Correction coefficient for pipe type, Cd: Correction for pipe diameter Coefficient, Cg: Correction coefficient for terrain / ground, Cl: Correction coefficient for liquefaction, α: Maximum acceleration of earthquake motion ([gal] or [cm / sec]
2]),

In the process of step # 102, the pipe network P
Pipeline damage rate (Rm) for all pipes constituting N
Therefore, a process of giving a pipe type and a pipe diameter to all the pipes constituting the pipe network PN based on the information of the pipe information file Fa is performed. Calculation processing is performed based on a correction coefficient (Cg) relating to the terrain / ground, a correction coefficient (Cl) relating to liquefaction, and a maximum acceleration (α) of the seismic motion. The correction coefficient (Cg) relating to the terrain and the ground and the correction coefficient (Cl) relating to liquefaction can be stored in the pipeline information file Fa. In order to prevent the information from increasing, a layer that manages such information for each region is used, and this layer is superimposed on the region where the pipe network PN exists, and a process of giving the information set in the layer to each of the superimposed pipelines is performed. It is effective to set the processing mode to perform. For the maximum acceleration (α) of the seismic motion, set information corresponding to the area for the layer,
The processing mode is set so that the information set in this layer is superimposed on the existing pipe network PN to give seismic motion information to each of the pipelines.

In step # 103, a process of estimating the pipe damage probability (Pf) from the pipe damage rates (Rm) estimated for all the pipes and the pipe length information (L) (pipe length) is performed. . The pipeline damage probability (Pf) is given by the following equation.

Pf = 1−EXP (−Rm × L), L: pipe length,

In step # 104, the damaged pipeline is estimated from the pipeline damage probability (Pf) obtained as described above, based on the theory of probability based on random numbers. The damaged pipeline is a pipeline that generates water leakage, and is specifically determined by comparing the pipeline damage probability (Pf) set for each pipeline with the random number generated by the system. The pipeline damage probability (P
If the value of the random number is smaller than the value of f), it is estimated that the damage is caused, and if the value of the random number is larger than the value of the pipeline damage probability (Pf), it is estimated that the damage is not caused. The estimation is repeated about 100 times, and if it is determined that even one damage has occurred, it is estimated that the damage will occur.

In step # 105, a process of storing the identification information of the damaged pipeline (damaged pipeline) estimated to be damaged in a memory or the like is performed.

In the damage estimation process (#B), the amount of water leakage is determined for all damaged pipelines, the amount of leakage of each pipeline is analyzed, and a region where water is cut off from a pressure drop due to the leakage is determined. In the process, as shown in the flowchart of FIG. 12, identification information is set to identify each of the damaged pipelines stored in step # 105 (step # 201), and the subsequent hydraulic analysis is performed. In the initial setting, the take-out amount (Wo) of the water leakage pipe is set to the provisional water amount (Wt), and the water pressure (Ho) of the water leakage pipe is set to the provisional water pressure (Ht) (Step # 202). Next, this temporary water pressure (H
The amount of water leakage (Rt) is calculated from t) (Step # 203). For this calculation, an equation indicating that the water pressure and the amount of water leakage are in a 1.15 power relation as shown in FIG. 13 is used (FIG. 13 shows the relation between the water pressure and the amount of water leakage of a pipe having a diameter of 200 mm). It is shown).

Next, the amount of water leakage (Rt) is added to the amount of pipe taken out (Wo), and the result (Wt) is used to calculate the line water pressure (Hp).
t) (Step # 204), and the provisional hydraulic pressure (H
t) and the average value of the pipeline water pressure (Hpt) are set to the provisional water pressure (Ht) (Step # 205), and the absolute value of the provisional water pressure (Ht) and the pipeline water pressure (Hpt) is set to a preset threshold value. The processes of steps # 203 to # 205 are repeated (repeated) until the pressure becomes smaller, and the provisional water pressure (Ht) and the pipeline water pressure (Hp)
When the absolute value of t) becomes smaller than a preset threshold value (when it converges), the repetition of the processing is finished, and the pipeline water pressure (Hpt) or the water pressure of the pipeline connected to the pipeline, Is compared with the water cutoff pressure to discriminate the pipes that are in the water cutoff state from the pipes that can be supplied with water, display the information indicating the water cutoff area on the display 1, and store the information in the memory. (Steps # 206 to # 208).
When the processes of steps # 203 to # 205 described above are repeated, as shown in the graph of FIG. 14, the provisional water pressure (Ht), the water leakage amount (Rt), and the pipeline water pressure (Hpt. Is described as water pressure), and the provisional water pressure (Ht), the amount of water leakage (Rt), and the pipeline water pressure (Hpt) are obtained by repeated processing.
Converges, and as a result, can be given as water pressure in the pipeline.

As shown in the flowchart of FIG. 15, the anti-seismic assumption process (#C) compiles weight values K1 to K6 (collectively referred to as weight value K) based on the information on the damaged pipeline and the weighting information. Then, the results of summing (integrating) the weight values K1 to K6 are compared and displayed on the display 1 as the priority order of the pipeline to be earthquake-resistant from the pipeline having the largest sum value. Pipes with value K or more, or
Based on the set number of pipelines, the pipeline to be earthquake-resistant is assumed to be displayed on the display 1, and furthermore, processing for storing information on the pipelines thus assumed in a memory is performed (#). 301 to 303 steps). When performing the process of automatically setting the pipeline to be earthquake-resistant as in this process, the pipeline to be earthquake-resistant is displayed in accordance with the priority order based on the weight value K, and displayed in this manner. The operator can select an arbitrary number of pipelines to be made seismic-resistant from the top, and the operator inputs a weight value as a threshold to be made earthquake-resistant from those displayed, and the value of a value larger than this threshold can be obtained. It is also possible to set and implement a processing mode so as to select a pipeline to be subjected to earthquake resistance for a weight value.

The weight value is set for each pipeline based on the processing of FIG. Specifically, the damage rate (Rm) of the pipeline, the aging degree (Y) of the pipeline, the laying position of the pipeline (SP), the water supply point (DP), the flow ratio of the pipeline (Wq) , A weight value is given corresponding to the average pressure change amount (Ap) of the pipeline and the population to be reduced (Lp), and the damage factor (Rm) is the correction coefficient (α1) of the pipeline. Is multiplied by the damage rate (Rm) and the weight value (K
1), for the aging degree (Y), the result of multiplying the aging degree (Y) by the correction coefficient (α2) of the pipeline is given as a weight value (K2), and for the installation position (SP),
The result of multiplying the correction coefficient (α3) of the pipeline by the importance score (N) is given as a weight value (K3), and the water supply point (DP)
, The result of multiplying the correction coefficient (α4) of the pipeline from the water source S to the water supply point DP by the importance score (N) is given as a weight value (K4), and the flow rate ratio (Wq) is The result of multiplying the correction coefficient (α5) by the importance score (N) is given as a weight value (K5), and the average pressure change amount (A
For p), the result of multiplying the correction coefficient (α6) of the pipeline by the importance score (N) is given as a weight value (K6), and for the low pressure target population (Lp), the correction of the pipeline A process of multiplying the coefficient (α7) by the importance score (N) as a weight value (K7) is performed in advance.

In the damage rate (Rm), a pipe with a higher damage rate (Rm) has a larger weight value (K1).
In the aging degree (Y), the weight value (K
2) is to be increased, and a large value of importance score (N) is set for those laid on an emergency road where restoration work cannot be performed immediately at the laying position (SP), and the water supply point (DP) For the pipelines that supply water to the pipelines, the pipelines that supply water to the water supply point (DP) of hospitals or public facilities where residents are evacuated in the event of a disaster are extracted, and the higher the importance set by the operator for these pipelines, the greater the value In the flow ratio (Wq), the larger the flow rate flowing through the pipeline, the larger the importance score (N) is set, and the average pressure change amount In (Ap), the importance score (N) of a larger value is set for a pipeline in which the pressure change exerted on the entire pipeline becomes larger at the time of damage. The larger the population, the larger the value It is to set the importance score (N). The correction coefficients α1 to α7 are arbitrarily set by an operator in order to match the weight values. still,
When the weight value is set, for example, in the case of the damage rate (Rm), the damage rate (Rm) and the weight value are stored in a table format in correspondence with each other, and when the weight value is given, the processing is read out from the table. It is also possible to set the form.

Next, a process for selecting a main line M for sending water from the water source S to the water supply point DP will be described. When this processing is performed, the entire pipe network PN is displayed on the display 1 based on the information from the pipe information file Fa as described above, and in the state displayed in this manner, as shown in the flowchart of FIG. By executing the main line search routine as the main line search means of the present invention, it becomes possible.
In other words, when this routine is executed, a message indicating that the water supply point DP should be selected is displayed, and the cursor is moved by operating the mouse 5 or the keyboard 4 in accordance with the instruction, thereby moving the cursor to a hospital or school or public facility where residents are evacuated in the event of an earthquake. Alternatively, the water supply point DP is designated by an operation such as setting a fire hydrant or the like at a position enabling efficient fire extinguishing when a fire occurs and operating a switch of the mouse 5 (step # 401).

When this designation is made, as shown in FIG.
It is also possible to open another window W2 on the display 1 and specify the water supply point DP while displaying the enlarged pipe network in this window W2. And FIG.
In the pipe network PN schematically shown in FIG. 2, for example, when the maximum flow rate is sent to the route (main trunk M) shown by the broken line, when the water supply point DP is designated, the water supply point DP The intersection P1 at a close position is extracted, and the intersection P1
Is extracted, and then the flow direction and flow rate of each of the plurality of paths extracted in this way are obtained by hydraulic analysis, and the maximum flow rate among the paths for sending water to this intersection is obtained. A process for extracting a route is performed. Next, an intersection P2 on the upstream side in the path thus extracted is determined, all the paths connected at this intersection P2 are extracted, and the flow direction and the flow rate of the path are determined by hydraulic analysis to obtain the maximum flow rate. In the same drawing, the process of extracting the route to be determined is sequentially performed for the intersections P3 to P6 until it is determined that the route is directly connected to the water source S, and when it is determined that the route is directly connected to the water source S (# 402). ~ # 405 steps), the process of extracting intersections is stopped, the route extracted so far and the last extracted route are set as the main trunk M and displayed on the display 1 (see the figure). The process of adding the name of the water supply point DP and performing memory storage (storing) of information for identifying a plurality of pipelines forming the main trunk line M for the water supply point DP is performed (# 408, #). 409 steps)

The main trunk line M thus extracted is displayed so as to overlap with the pipe network PN displayed on the display 1. In this display, the color of the conduit indicating the main trunk line is changed. It is emphasized by making it different or blinking. In addition, the main line is connected to the water supply point DP from the water source S as described above.
Are formed by combining a plurality of pipelines, and the information for identifying the pipelines described above has a structure in which information for identifying these pipelines is continuous. The operator performs an operation of arbitrarily setting the importance score (N) for the pipeline configuring the main trunk line M corresponding to the DP. In addition, in the earthquake resistance cost calculation process (#C ′), the sum of the respective construction costs when replacing the pipes in each of the pipelines assuming the earthquake resistance in the earthquake resistance estimation process (#C) is stored.

The second estimation process (#D) is different from the second embodiment only in that a part of the pipeline is made earthquake-resistant in the earthquake-resistance assumption process (#C).
The processing to be performed is the same as the above-described first estimation processing (#A), and the damage estimation processing (#E) performed thereafter is also the same as the above-described damage estimation processing (#B). It has become.

In the comparison process (#F), the water interruption area and the water interruption rate estimated in the damage estimation processing (#B) are compared with the water interruption area estimated in the damage estimation processing (#E). The output process (#G) is a process, and as shown in FIG. 20, for example, as shown in FIG. 20, the window W3 is opened on the display 1 and the population and the rate of water interruption between "before earthquake resistance" and "after earthquake resistance" Is displayed as a numerical value, and at the same time, an area where water is cut off in the pipe network PN is displayed (hatched area in the figure), so that the operator can easily grasp the comparison of the damage. In addition, this system is configured so that the printer 6 can print the comparison result and the construction cost required for earthquake resistance.

As described above, in the present invention, the basic processing mode is set so as to estimate the damaged pipeline of the pipeline constituting the pipe network PN based on the earthquake information. In addition to easily performing simulations for earthquakes with the same seismic intensity but different seismic intensities, it is also necessary to obtain and save the population and rate of water interruption based on the estimated damage pipeline, and It is assumed that the pipeline will be made earthquake-resistant based on the rules set in advance. By comparing with the water interruption rate, the evaluation of the pipe network before and after seismic retrofitting can be performed in a state of comparison, and even the calculation of the construction cost required for seismic retrofitting can be performed.

In particular, when estimating the damage pipeline for the earthquake, the damage probability of the pipeline included in the region Z is calculated for each of the plurality of regions Z divided in a mesh shape, Since the damaged pipeline is estimated by comparison, it is easy to assume and a reasonable pipeline based on the theory of probability is extracted.The process of determining the amount of water leakage from the water pressure of the damaged pipeline extracted in this way, The process of obtaining the water pressure based on the volume is repeated (iteratively) until the convergence is achieved, so that the water pressure of the pipeline can be obtained with high accuracy. Of these, the pipeline to be earthquake-resistant is selected according to a preset rule, so that the selection is not troublesome, and as a result of the selection based on this rule, not only those aiming to improve the population and rate of water interruption, Reduce damage to pipelines that are susceptible to damage, promote seismic resistance of highly aged pipelines, and save time for restoration work in the event of an earthquake disaster. It is maintained to reduce the water interruption area during an earthquake disaster, and to reduce the pressure drop in the entire pipe network PN during an earthquake disaster. Further, since the pipe information file Fa for managing the pipe network PN can be used in the municipalities, it is not necessary to specially convert the pipe network PN into data, so that the processing can be easily performed.

When extracting a main trunk M for maintaining water supply to a hospital or a public facility from the pipe network, an operation of designating a water supply point DP in the pipe network displayed on the display 1 is performed. The main trunk M is extracted only by executing the main trunk search process.

[Another Embodiment] In addition to the above-described embodiment, the present invention is different from the above-described embodiment, for example, in that the second estimation processing (#D) among the control steps shown in FIG. #
A part of the damaged pipeline was made earthquake-resistant according to the priority without performing the same simulation as in A), that is, the water-disruption population and the water-disruption rate are obtained in the same state as when the damaged pipeline was restored according to the priority. It is also possible to carry out as follows. By setting the processing mode in this way, it is not necessary to execute the simulation twice as described above, and the processing time can be reduced.

Further, according to the present invention, it is possible to calculate the cost of the replacement pipe in the case of performing the earthquake-proofing process, and it is easy to calculate the cost of the earthquake-proofing work.

[Brief description of the drawings]

FIG. 1 is an overall view of a system.

FIG. 2 is a diagram showing a pipe network;

FIG. 3 is a block diagram showing a processing flow;

FIG. 4 is a block diagram showing the flow of information.

FIG. 5 is a flowchart of a first estimation process.

FIG. 6 is a diagram showing a mesh set in a pipe network;

FIG. 7 shows a structure of a pipeline information file.

FIG. 8 is a diagram showing a list of correction coefficients for pipe types;

FIG. 9 is a diagram showing a list of correction coefficients relating to a pipe diameter;

FIG. 10 is a diagram showing a list of correction coefficients relating to terrain and ground.

FIG. 11 is a diagram showing a list of correction coefficients relating to liquefaction.

FIG. 12 is a flowchart of damage estimation processing.

FIG. 13 is a graph showing the relationship between water pressure and water leakage.

FIG. 14 is a graph showing changes in water leakage, provisional water pressure, and water pressure during water pressure analysis of a water leakage pipe.

FIG. 15 is a flowchart of an earthquake resistance assumption process.

FIG. 16 is a diagram showing a list of expressions for weighting processing;

FIG. 17 is a schematic diagram of a pipe network.

FIG. 18 is a diagram showing a state where the entire pipe network and a part of the pipe network are displayed on a display.

FIG. 19 is a flowchart of a mainline search routine.

FIG. 20 is a diagram showing a state where a comparison result is displayed on a display;

[Explanation of symbols]

 2 storage means 3 processing device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seiji Fujiwara 2-47, Shikitsuhigashi, 1-chome, Namiwa-ku, Osaka-shi, Osaka (72) Inventor Noriyuki Arakawa, Shizutsu-Higashiichi, Naniwa-ku, Osaka, Osaka No. 2-47 Kubota Co., Ltd. (72) Inventor Kotaro Kawamoto 1-47 Shishitsu Higashi, Naniwa-ku, Osaka-shi, Osaka F-term (reference) 3J071 AA12 BB11 CC02 EE19 FF12 5B049 AA02 BB00 CC00 CC11 EE31 EE41 FF03

Claims (8)

[Claims] 1. An estimation process for estimating a pipeline damaged by an earthquake in a pipeline, and a selection process for selecting a pipeline to be made earthquake-resistant from a plurality of the pipelines thus estimated based on a preset rule. Pipe seismic selection system equipped with a processing unit that performs 2. The estimation processing comprises: dividing the pipe network into a plurality of areas; and calculating a damage rate based on the acceleration of the seismic motion and the laying conditions of the pipeline in each area; The seismic resistance selection system for a pipe network according to claim 1, comprising a process of estimating a damaged pipeline based on a random number. 3. The rule of the selection process is set so as to select seismic resistance from the one with the highest priority, and the priority is given to a pipeline with a high damage rate among the damaged pipelines estimated by the estimation process. 3. The method according to claim 1, wherein the order is higher.
The seismic retrofit selection system for pipe networks as described. 4. The rule of the selection process is set so that seismic retrofit is selected from those having a higher priority, and a predetermined water supply point of the damaged pipeline estimated by the estimation process is set. 3. The seismic selection system for a pipe network according to claim 1 or 2, wherein the priority of the main pipe supplying the most water is set higher. 5. The rule of the selection process is set so that seismic retrofit is selected from those having a higher priority, and a priority is given to a pipeline with a high degree of aging among damaged pipelines estimated by the estimation process. 3. The method according to claim 1, wherein the order is higher.
The seismic retrofit selection system for pipe networks as described. 6. The rule of the selection process is set so as to select seismic resistance from the one with the highest priority. 3. The seismic selection system for a pipe network according to claim 1, wherein the priority of the hydraulically important pipeline having a large population is made higher. 7. The rule of the selection process is set so that seismic retrofit is selected from the one with the lowest priority, and the cost is calculated so that the cost of the replacement pipe can be calculated. The seismic retrofit selection system for pipe networks as described. 8. The pipe network according to any one of claims 1 to 7, wherein the pipe network is configured to combine and use a plurality of pipeline installation information stored in a storage unit. Seismic selection system.